#!/usr/bin/env node

const cp = require('child_process')

console.log(`I am father, PID: ${process.pid}`)

const cat = cp.spawn('cat', ['data.txt'])
const sort = cp.spawn('sort')
const uniq = cp.spawn('uniq')

cat.stdout.pipe(sort.stdin)
sort.stdout.pipe(uniq.stdin)

uniq.stdout.pipe(process.stdout);
uniq.stderr.pipe(process.stderr);
